public class E2_3_5{
  public static void main(String args[]) {
    int [] a ={10,20,30,40}, b[]={{1,2},{4,5,6,7}};
    b[0]=a;
    b[0][1] = b[1][3];
    System.out.println(b[0][3]);    //[代码1]
    System.out.println(a[1]);   //[代码2]
  }
}
